"I saw the Prophet ﷺ wiping over the Khuff and the Khimar." [1] A head covering not limited to the common usage of "turban" as is clear from the first narration.

رَأَيْتُ النَّبِيَّ ﷺ يَمْسَحُ عَلَى الْخُفَّيْنِ وَالْخِمَارِ